Memory management method

G - Physics – 06 – F

Patent

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Details

G06F 12/02 (2006.01) G06F 12/14 (2006.01)

Patent

CA 2113565

A method of increasing the amount of directly addressable memory address locations that can be allocated to RAM. An initialization routine is executed to identify ROM's in reserved memory address space that are to be reallocated. Suitable address space in extended memory is located and the ROM's are mapped into extended memory address space. A ROM access interceptor routine is implemented to trap ROM accesses and direct them to the reallocated address space. A ROM access handler routine is implemented to contain the ROM execution and to restore the computer system to a condition where it can continue execution of application or system software after the ROM access is completed. Memory addresses in reserved address space formerly allocated to ROM's can be reallocated to RAM or other memory devices.

Méthode pour augmenter le nombre d'emplacements mémoire directement adressables qui peuvent être affectés à la RAM. Une routine d'initialisation est exécutée afin d'identifier les ROM dans l'espace adresses en mémoire supérieure à réaffecter. L'espace adresses convenable en mémoire étendue est repéré et les ROM sont mappées dans l'espace adresses mémoire étendu. Une routine d'interception d'accès à la ROM est mise en oeuvre afin d'intercepter les accès ROM et de les diriger vers l'espace adresses réaffecté. Une routine de traitement d'accès ROM est mise en oeuvre afin de gérer l'exécution des instructions en ROM et de remettre le système informatique en état de poursuivre l'exécution du logiciel d'application ou d'exploitation une fois terminé l'accès ROM. Les adresses mémoire de l'espace adresses en mémoire supérieure attribué antérieurement aux ROM peuvent être réaffectées à la RAM ou à d'autres mémoires.

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